JP3297126B2 - Automatic positioning method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for testing the dynamic balance of a rotating body such as a rotor of a motor and stopping the unbalance point at a predetermined position.

[0002]

2. Description of the Related Art In a positioning device according to a conventional unbalance measuring device, after capturing the position of an unbalanced point in an object being rotated at a high speed, the rotation of the object to be measured is decelerated and stopped. I was convinced. The stop position of the unbalanced point needs to be a specific position due to the process of the unbalance correction. Therefore, to stop at such a specific position, it is necessary to adjust or correct the stop position. Was.

That is, if the position where the object to be measured was once stopped after the test operation was deviated from such a predetermined position, the positioning had to be corrected.
For that purpose, it is required to correct the rotation amount from the start point of the deceleration control to the stop point. Conventionally, as a correction method, a stop position is corrected by measuring a rotation angle from a temporarily stopped position to a predetermined desired stop position and inputting the rotation angle to a positioning device.

[0004]

In the conventional stop position correcting method as described above, the rotation angle from the temporarily stopped position to a predetermined desired stop position is visually determined, and the angle is input to a positioning device. Therefore, it is necessary to try the positioning again and repeat the trial and error until the positioning is stopped at the correct position. Therefore, there has been a problem that the positioning operation is inaccurate and it takes time to correct the position.

Accordingly, it is another object of the present invention to provide a positioning method and apparatus which can correct accurate positioning in one trial.

[0006]

According to the present invention, an object to be measured is rotated by a rotary driving device, an unbalance point is measured by an unbalance measuring device, and then the rotation of the object to be measured is controlled. In an automatic positioning method configured to stop after rotation of a predetermined positioning rotation amount, once the positioning is stopped at a position determined by the positioning rotation amount, the object to be measured is further corrected and rotated to a desired position. In addition, the correction rotation amount at this time is stored, and in the positioning from the next time, the positioning is stopped based on the positioning rotation amount corrected by the correction rotation amount.

In the positioning device according to the present invention, a driving means for rotating the object to be measured, an unbalance measuring device for detecting an unbalanced point of the rotating object to be measured, and a method for detecting the unbalanced point, A positioning control unit that controls the driving unit to stop the object to be measured after the rotation of the predetermined positioning rotation amount, a correction rotation unit that once rotates the object to be measured, and then further rotates the object to be measured; Means is provided that includes a corrected rotation amount storage unit that detects and stores the rotation amount, and a rotation amount correction unit that corrects the positioning rotation amount based on the corrected rotation amount.

[0008]

According to the positioning method of the present invention, the object to be measured is rotated by the rotation driving device, and the unbalance point is measured by the unbalance measuring device. In the automatic positioning method configured to stop after the rotation of the rotation amount, once the positioning is stopped at the position determined by the positioning rotation amount, the object is further corrected and rotated to a desired position and stopped. At the same time, the corrected rotation amount at this time is stored, and the positioning rotation amount is corrected by the corrected rotation amount. Therefore, in the next positioning, the motor stops at the position rotated by the corrected positioning rotation amount.

In the positioning device of the present invention, the object to be measured is driven to rotate, and the unbalance point of the rotating object to be measured is detected by the unbalance measuring device. The device to be measured is stopped by controlling the driving means by the positioning control means and detecting the unbalanced point and then rotating by a predetermined positioning rotation amount. At this time, if the stop position is not the desired position, the object to be measured is further rotated by the correction rotation means to position the stop at the desired stop position. The corrected rotation amount at this time is detected and stored in the corrected rotation amount storage means. Since the positioning rotation amount is corrected based on the corrected rotation amount, the positioning can be stopped at a desired position at the next positioning.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a positioning device using the method of the present invention will be described in detail based on embodiments. FIG. 1 is a configuration diagram of the positioning device. In the figure, 1 is a dynamic balance tester, 2 is a rotor as an object to be measured, 3 is a driving means for rotating the rotor 2, and rotates the stepping motor according to the number of pulses inputted to the stepping motor. And a driving device.

Reference numeral 4 denotes an unbalance point P of the rotating rotor 2.
And includes a bearing unit 5 for detecting vibration due to the rotation of the rotor 2, a measuring circuit 6, and a control circuit 7 for outputting a pulse for controlling the precursor stepping motor 3. Numeral 8 denotes a positioning control means, which generates a signal for deceleration control for positioning at the timing when the unbalance point P is detected by the unbalance measuring device 4, and outputs the signal via the control circuit 7 to the stepping motor. 3, the rotation of the rotor 2 is stopped after the rotation of the number N of positioning pulses corresponding to the predetermined positioning rotation amount.

Numeral 9 denotes a correction rotation means, and the control circuit 7
By outputting a low-speed rotation command to the rotor 2, the rotor 2 that has once stopped positioning is rotated forward or backward to a desired position. Reference numeral 10 denotes a pulse counter as a correction rotation amount storage means, which stores the correction rotation amount rotated by the correction rotation unit 9 as the correction pulse number ΔN by integrating the number of pulses output to the stepping motor 3.

Numeral 11 denotes a rotation amount correcting means, which inputs the correction pulse number ΔN to the control circuit 7 and performs a correction operation on the positioning pulse number N to obtain a new positioning pulse number N ′.

FIG. 2 is a diagram for explaining the correction rotation when the stop position of the unbalance point is A and B. A desired position for positioning is C. FIG. 3 is a timing chart showing signals of respective parts and their timings in the process of positioning.

In FIGS. 2 and 3, the case where the stop position is A before the desired stop position C will be described below. When the rotation is stable, the unbalance measuring device 6
After the phase difference between the mark on the surface of the rotor 2 and the unbalanced point is measured, a deceleration command is output from the positioning device 8 at the timing when the mark is detected.

When this deceleration command is input to the control circuit 7, a pulse train is input to the drive device 3 so as to decelerate according to a predetermined deceleration curve and to stop. The total number of pulses in this pulse train corresponds to the number N of positioning pulses set inside the control circuit 7. That is, the rotor 2 stops after the rotation amount corresponding to the number N of positioning pulses.

When the unbalance point of the rotor 2 stopped by the deceleration control is the position A shown in FIG. 2, if the rotor 2 is further rotated forward by the angle θ1, the position becomes the predetermined position C. Can be positioned. Then, when the forward rotation switch S1 of the correction rotation means 9 is pressed, a rotation command is output to the control circuit 7, and a pulse train is additionally output from the control circuit 7 for the low-speed rotation. When the normal rotation switch S1 is released when the unbalance point reaches the predetermined position C, the rotor 2 stops immediately.

The number of additional pulses output during this time is stored in the pulse counter 10 as the number of correction pulses ΔN. The number of correction pulses ΔN is equal to the rotation amount correction means 11
And is added to the number N of the positioning pulses to obtain a corrected number N 'of positioning pulses. Therefore, in the next positioning, the corrected positioning pulse number N '
, The unbalanced point can be positioned at the predetermined position C.

When the stop position of the unbalanced point exceeds the predetermined position C by the angle θ2 as in the position B in FIG. 2, the rotor 2 is pushed by pressing the reverse switch S2, contrary to the above description. Reverse to a predetermined position C.
The number N 'of correction pulses at this time is input to the rotation amount correcting means 11, and is subtracted from the number N of positioning pulses to obtain a corrected number N' of positioning pulses.

Therefore, in the next positioning, the positioning is controlled based on the corrected number of positioning pulses N ', so that the unbalanced point can be positioned at the predetermined position C.

As described above, according to the positioning apparatus of this embodiment, in the positioning by the test, even if the unbalance point is before or too far from the predetermined position, the switch can be operated simply by operating the switch. By rotating forward or backward, positioning can be performed in accordance with a predetermined position.
In addition, the amount of rotation at this time is automatically read and the number of positioning pulses of the control circuit is corrected.
The effect is obtained that the positioning can be corrected accurately and promptly.

In the above embodiment, a stepping motor is used as the driving means, and the amount of rotation in the correction rotation is detected by integrating the driving pulses.
Obviously, a servo motor or the like having a rotation detecting means such as a rotary encoder can similarly be used. Further, the case where the mark is provided on the surface of the rotor 2 has been described, but a no-mark unbalance measuring device may be used.

[0023]

According to the automatic positioning method of the present invention, the object to be measured is rotated by the rotary drive device, the unbalance point is measured by the unbalance measuring device, and then the rotation of the object to be measured is controlled. If the stop position of the unbalance point is deviated from the predetermined position at the time of stopping, the object to be measured is further rotated to the desired position and stopped, and the correction rotation amount at this time is increased. By correcting the positioning rotation amount on the basis of the positioning, the positioning can be corrected accurately and promptly, so that the effect of improving the efficiency of the positioning work for the work of correcting the imbalance can be obtained.

According to the automatic positioning device of the present invention, it is possible to provide an excellent positioning device having the above-mentioned effects.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a positioning device used in an automatic positioning method of the present invention.

FIG. 2 is a diagram showing a stop position of an unbalance point.

FIG. 3 is a timing chart showing timings of signals of respective parts of the automatic positioning device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dynamic balance tester 2 DUT 3 Driving means 6 Unbalance measuring device 7 Positioning control means 9 Correction rotation means 10 Correction rotation amount storage means 11 Rotation amount correction means P Unbalance point N Positioning rotation amount N 'Correction rotation amount

Claims (2)

(57) [Claims] An object to be measured is rotated by a rotation drive device, and an unbalance point is measured by an unbalance measuring device. Then, the rotation of the object to be measured is controlled so that the rotation of a predetermined positioning rotation amount is controlled. In the automatic positioning method configured to stop later, once the positioning is stopped at the position determined by the positioning rotation amount, the object is further corrected and rotated to a desired position and stopped. An automatic positioning method, wherein a corrected rotation amount is stored, and the positioning is stopped based on the positioning rotation amount corrected by the corrected rotation amount. 2. A driving means for rotating and driving an object to be measured, an unbalance measuring device for detecting an unbalanced point of the rotating object to be measured, and a rotation of a predetermined positioning rotation amount after detecting the unbalanced point. Later, a positioning control means for controlling the driving means so as to stop the object to be measured, a correction rotating means for rotating the object once after positioning, and a rotation amount detected and stored by the correction rotating means. An automatic positioning device, comprising: a corrected rotation amount storage means for performing the correction; and a rotation amount correction means for correcting the positioning rotation amount by the corrected rotation amount.